I've seen a bunch of crap around about how you NEED a ac30 to get a "Edge" amp sound, and I've been to guitar center, and tried out ac15, and I just haven't tried out an ac30, and I thought that the ac15 sounded really good for an edge sound. So, I was wondering if you guys out there have compared a ac15 to an ac30, or own an ac15, or ac30, and think there is a SIGNIFIGANT sound difference between those two amps. Thanks.